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Mashcka [7]
3 years ago
13

When classified, all living things have

Chemistry
1 answer:
topjm [15]3 years ago
3 0

Answer: 2 or more cells

Explanation:

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How many atoms of lodine(I) are in 0.156 grams of I?
CaHeK987 [17]

Answer: iodine 131 iodine 132 isotopes

Explanation:

4 0
3 years ago
Equal amounts of N2 and O2 are added, under certain conditions, to a closed container. Which changes occur in the reverse reacti
geniusboy [140]
1) The forward reaction is N2 (g) + O2 (g)  → 2NO

(that reaction requires special contitions because at normal pressures and temperatures N2 and O2 do not react to form another compound.

2) The equiblibrium equation is

  N2 (g) + O2 (g)  ⇄ 2NO

3) Then, the reverse reaction is

2NO → N2(g) + O2(g)

Answer: 2NO → N2(g) + O2(g)
4 0
3 years ago
Word equations- Please help ASAP
nekit [7.7K]

Answer:

See answer below

Explanation:

In this case, you just need to use any acid you want (Like HCl, or H₂SO₄) to do this exercise.

You are given a sample of what you have to do which is:

Acid + metal ------> Salt + hydrogen

As you can see, an acid like the ones I wrote above, have hydrogen atoms, so you should put the hydrogen there. As for the part of salt, you just need to draw the corresponding salt that is formed when the acid reacts with the metal, and write it's name.

Let's do all three equations for you to a better understanding. For all the given examples, I will use HCl as acid, and i will explain one reaction cause the other two reactions happens the same thing, only with a different metal.

1. 2HCl + Zn ------> ZnCl₂ + H₂

As you can see, we just have a displacement reaction where the metal displaces the position of the hydrogen to form the salt and the hydrogen leaves the molecule as a gaseous molecule. Written in words it would be:

Hydrochloric acid + Zinc ----> Zinc chloride + hydrogen

2. 2HCl + Pb -------> PbCl₂ + H₂

Hydrochloric acid + lead ------> Lead (II) chloride + hydrogen

3. 2HCl + Fe -------> FeCl₂ + H₂

Hydrochloric acid + iron ------> Iron (II) chloride + hydrogen

Hope this helps

4 0
3 years ago
During steps 6–8, the
Allushta [10]

Answer:

Particle Size

Reaction rate

3 0
3 years ago
Aluminum and cloride undergoes a synthesis reaction if 8molnof Al reacts with 10mol of cl, what is the maximum amount of AlCl3 c
Inessa [10]

<u>Answer:</u> The mass of AlCl_3 produced is 889.38 g

<u>Explanation:</u>

We are given:

Moles of Al = 8 mol

Moles of Cl_2 = 10 mol

For the given chemical reaction:

2Al+3Cl_2\rightarrow 2AlCl_3

By stoichiometry of the reaction:

If 3 moles of chlorine gas reacts with 2 moles of Al

So, 10 moles of chlorine gas will react with = \frac{2}{3}\times 10=6.67mol of Al

As the given amount of Al is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Thus, chlorine gas is considered a limiting reagent because it limits the formation of the product.

By the stoichiometry of the reaction:

If 3 moles of Cl_2 produces 2 mole of AlCl_3

So, 10 moles of Cl_2 will produce = \frac{2}{3}\times 10=6.67mol of AlCl_3

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

We know, molar mass of AlCl_3 = 133.34 g/mol

Putting values in above equation, we get:

\text{Mass of }AlCl_3=(6.67mol\times 133.34g/mol)=889.38g

Hence, the mass of AlCl_3 produced is 889.38 g

4 0
3 years ago
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